ChatGPT
OpenAI · General AI · Writing · Research · Coding · Agents
OpenAI's assistant built on the GPT model family. One of the most widely used AI products, with custom instructions, optional memory, file uploads, web browsing, voice, and project workspaces.
Best for: All-round assistant with strong persistent personalization (Custom Instructions + Memory + Projects).
| Models | GPT model family (multiple tiers) |
|---|---|
| Free plan | Yes, capable free tier |
| Paid plans | Paid subscriptions add stronger models and higher limits |
| API | Yes (OpenAI API, separate from the consumer app) |
| Custom instructions | Yes, Custom Instructions (persistent), plus per-Project instructions |
| Memory | Yes, optional cross-chat memory |
| File upload | Yes |
| Web search | Yes |
| Context window | Model-dependent; large on current tiers |
| Apps | Web · iOS · Android · Windows · macOS |
Facts last reviewed 2026-08-10, capabilities and plans change frequently; verify on the official site before relying on a detail.
Models, limits and pricing
| Current models | GPT-5.6 Sol, flagship, frontier model for complex professional work GPT-5.6 Terra, balances intelligence and cost GPT-5.6 Luna, cost-optimised; default model for Free and Go GPT-5.5 and GPT-5.5 Pro, still selectable GPT-5.4 / GPT-5.4 Pro / GPT-5.4 mini / GPT-5.4 nano, legacy picker entries |
|---|---|
| Context window | 1,050,000 tokens (GPT-5.6 Sol / Terra / Luna); 128k max output |
| Parameters | Not disclosed most closed frontier models do not publish parameter counts; we do not repeat rumored figures. |
| Modalities | Text + image in; text out; voice mode; image and video gen via tools |
| Consumer pricing |
|
| API pricing | gpt-5.6-sol: $5.00 / 1M input, $30.00 / 1M output |
Pricing and model line-ups verified 2026-08-11 from source 1 ↗ · source 2 ↗ · source 3 ↗. These change often. The vendor page is authoritative.
Notable
- Custom GPTs let you package a prompt as a reusable assistant
- Projects group chats with shared instructions and files
Agents that work well here
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